Models 14.4 - 26.4, controller pCO
2
Blue Box - Page 81
SYMPTOM
OPERATION
PROBABLE CAUSE
POSSIBLE CORRECTIVE ACTION
COOLING
HEATING
E1)
No compressor
running. Display On:
unit ON with alarm
“High Pressure
Compressor 1, 2, 3, 4”
⊗ ⊗
220V fuses burnt-out
(FU51) (in version LC and
LC/HP also the alarm “Fans
protection” will be
displayed)
Change fuses. If fuses burn-out
again contact assistance
⊗
Insufficient condenser
water flow
Check hydraulic circuit and
condenser water flow
⊗ ⊗
Entering condenser water
temperature too high
Check hydraulic circuit of
condenser
⊗ ⊗
The unit has an excessive
refrigerant charge (only
version LC and LC/HP)
Call assistance
⊗ ⊗
Remote condenser faulty
(only LC version LC and
LC/HP)
E2)
No compressor
running. Display On:
⊗ ⊗
Entering condenser water
temperature too high
Check flow and temperature of
condenser entering water
unit ON with alarm
“Thermal protections
Compressor 1, 2, 3, 4”
⊗ ⊗
Drop in power feeding
voltage
Check voltage stability and fit
appropriate protection if
necessary
⊗ ⊗
Setting of thermal
protections
Contact assistance
⊗ ⊗
Circuits partially discharged Call service to replenish charge
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